自动化专业英语——Introductions-to-Optimal-Control-Systems课件

1、Lesson 14 Introductions to Optimal Control Systems New words and phrases :1.optimal adj.最佳的，最理想的2. optimization n.优化，最优化，最佳化3. index n.索引，标志，指标，指数4. attainable adj.可到达的，可得到的5. deviation n.偏离，背离(from)6. hamper v.妨碍，牵制return*专业英语27. compromise n.妥协，和解8. tractable adj.易驾驭的9. payload n.有效载荷负载 10. vehicl

2、e n.车辆，运载工具11. residual adj.剩余的，残留的12. propellant adj.推进的 n. 推进物，火药13. velocity n.速度，速率，迅速14. ionic adj. 离子的*专业英语315. quadratic adj.二次 n. 二次方程式16. beforehand adv.事先，预先17. repertory n.仓库，贮藏所18. inferior adj.下等的，下级的19. suboptimal adj.不最理想的20. prototype n. 原型，样机*专业英语4Notes(1) The concept of control sys

3、tem optimization comprises a selection of a performance index and a design which yields the optimal control system within limits imposed by physical constraints. Such an optimal control system differs from an ideal one in that the former is the best attainable in the presence of physical constraints

4、 whereas the latter may well be an unattainable goal.*专业英语5控制系统优化的概念包括性能指标的选择和在物理条件限制下最优控制系统的设计这两部分。最优控制系统和理想最优控制系统的差别在于前者是在物理条件限制的情况下可达到的最好结果，而后者是不可能达到的目标。*专业英语6句中which引导的定语从句修饰a design。a selection of a performance index和a design which yields the optimal control system within limits imposed by phys

5、ical constraints是并列宾语。连词that引导的宾语从句作介词in的宾语。*专业英语7(2) In solving problems of optimal control systems, we may have the goal of finding a rule for determining the present control decision, subject to certain constraints which will minimize some measure of a deviation from ideal behavior.在解决最优控制系统的问题时，

6、我们有可能找到一个确定现有控制策略的规则，在某些约束条件下使它偏离理想状态的偏差测量值达到极小。*专业英语8(3) The optimization process should provide not only control policies, parameter configurations which are optimal, but also a measure of the degradation in performance by the departure of the performance index function from its minimum (or maximu

7、m) value which results from the use of nonoptimal control policies.*专业英语9优化过程不仅提供最优控制策略和最优参数配置，还提供在应用非最优策略的条件下，性能指标函数偏离它的极小(或极大)值时也能衡量性能上降低的程度。not only.but also，是固定句型。翻译为不但而且。 *专业英语10(4) Therefore, before we decide whether to build the optimal control system or something inferior but simpler, we sho

8、uld carefully evaluate a measure of the degree to which the performance of the complex, optimal control systems exceeds that of a simpler, suboptimal one. Unless the optimal control system can be justified, we shall not build extremely complicated, optimal control systems.*专业英语11因此，在决定构建最优控制系统或者决定构建

9、性能上较差、但比较简单的控制系统之前，我们应该仔细地权衡复杂的最优控制系统优于简单的次优控制系统程度。除非最优控制系统经过充分论证，否则我们不会去构建一个极其复杂的最优控制系统。*专业英语12句中whether引导是宾语从句，whether.or.，翻译为是还是，或者或者。that代指前面的the performance。Unless意思为除非，引导的是条件状语从句，从句用一般现在时，主句用一般将来时。 *专业英语13状语从句的译法1. 译成汉语的偏正复句(把英语的状语从句前置或后移) A body at rest will not move till a force is exerted on it.(时间状语从句译成汉语的条件状语)若没有外力的作用，静止的物体不会移动。*专业英语142. 译成汉语的联合复句He made notes as he was listening to the lecture. (时间状语从句译成汉语的并列关系)他边听课，边做记录。*专业英语15